Note: The following table shows Food Network Kitchen's preferred internal temperatures for meat and poultry based on taste and texture. Out of a concern for safety, the USDA recommends higher temperatures for whole cuts of beef and lamb than we do.
In skillet, cook onion in ... Spread mixture over flounder fillets (that you have washed). Roll ... Pour over fillets. Bake in hot 400 degree oven for 25 minutes. Sprinkle with ... with fork. Serves 4.
Line the toaster oven pan with aluminum foil, or you can just use foil like a pan but fold all four sides up to make it like a pan to hold drippings. Then use the bake setting at a temperature of 400 degrees for about 30-40 minutes. My toaster oven takes about 45 minutes for a boned breast so I'd aim for less and add more cooking time if needed. Cooking it at a higher temperature is best for chicken and keeps some of the moisture in because it cooks faster.